An environmental group seeking documents related to alleged illegal dumping of wastewater from oil and gas drilling into a northeast Ohio storm sewer is suing the state for access to the records.

The Sierra Club filed its suit Monday in the Ohio Supreme Court. The group alleges the Ohio Department of Natural Resources has failed to produce public records it requested six months ago.

The club’s Ohio chapter is seeking documents related to the department’s investigation of D&L Energy and Hardrock Excavating in Youngstown.

The department revoked the firms’ permits in February amid a federal investigation into the dumping of up to 40,000 gallons of wastewater from hydraulic fracturing into a storm sewer that drains into the Mahoning River.

A spokeswoman said the department does not comment on pending litigation.

The owner of a northeast Ohio fluid injection well has agreed to stop injecting brine used in drilling after a series of earthquakes were reported in the area. The Ohio Natural Resources department announced the agreement with Northstar Disposal Services.

The owner of a northeast Ohio fluid injection well has agreed to stop injecting brine used in drilling after a series of earthquakes were reported in the area. The Ohio Natural Resources department announced the agreement with Northstar Disposal Services LLC on Friday.

The injection well, located in the Youngstown area, is used to dispose of brine that’s a byproduct of oil and gas drilling. Thousands of gallons of brine are injected into the well daily.

Ten earthquakes have occurred this year within two miles of the well. Each registered at 2.7 magnitude or lower.

The department told The Associated Press more detailed data from Columbia University about a Christmas Eve quake prompted the agreement. And injections were halted as a precaution, so potential links with earthquakes can be assessed.